Machine for banding armatures



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Patented Nov.. 1l, 1924..

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ROBERT J. WHITE, OF WILKXNSBURG, PENNSYLVANIA, ASSIGNOR T 'WESTNGHOUSE ELECTRIC @a MANUFJLCTURNG CMFANY, CORPGRATON 0F PENNSYLVANIA.

MACHINE FOR BANDING ARTATURES.

Application filed September 16, 1922. Serial No, 588,681.

To @ZZ 'wiz-om it concern Be it known that I, Ronnn'r J. VHHE, a citizen of the United States, and a resident of l/Vilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Machines for Bending rmatures, of which the following is a specification.

My invention relates to tension devices, more especially to a device for banding armatures of electrical machines with steel wire.

lt is among the objects of this invention to provide a device of the above-designated character which shall be of simple compact structure, which shall be easy to manipulate and which shall be adjustable to obtain various degrees of tension on the wire drawn therethrough.

in the accompanying drawing constituting a part hereof and in which like reference numerals designate like parts,

Figure 1 is a side elevational view of a device embodying the principles of this in- '3 vention; and

Fig. 2 is an end view thereof.

Referring to the Fig. 1, the reference numeral 1 designates a pair of end supports or pillar blocks to which a bed plate 2 is secured. The bed plate 2 is provided with an accurately machined way 3 on which a head stock 4 having a movable center 5 is mounted, and the bed plate is further provided with a side opening 6 in which a saddle 7 is movably mounted. rlhe armature to be wound is rotatably mounted on the center of the head stock and a similar center of the tail stock (not shown) and is rotated by a suitable source of motor power, such as a motive, belt transmission, or the like.

The saddle 7 is pro-vided with a hand wheel 8 having a pinion mounted on its supporting shaft 9 which engages a gear rack in the bed plate 2 to e'ect lateral movement of the saddle within the limits of the opening 6. A bearing bracket 10, adapted to rotatably mount a shaft 11, is secured to the saddle. 7 in alignment with a similar bracket 12. A. tension drum 13 is rotatably mounted on the shaft 11 in alignment with a plurality of wire guide wheels 14 and a pair of guide wheels 15, the latter being rotatably mounted on movable centers 16 having a helical spring 17 disposed therebetween and being secured in a guide bracket 18 mounted on the saddle 7. A plurality of bearing brackets 19, 20 and 21, adapted to receive a plurality of gear shafts 22 and 23, respectively, parallel with the shaft 11, are likewise secured to the saddle 7 and are provided with a plurality of gears 24, 25 and 26 constituting a gear transmission.

A motor 27 is mounted'on one end of the saddle and is connected by a pinion 28 to the gear 26.

rlhe wire supply reel (not shown) is rotatably mounted between the supporting pillar 1 of the bed plate, and the banding wire 29 is connected from the reel over a wire-guide wheel 30 through the guide wheels 14, thence to the tension drum 13 on which it is wound, thence to the yieldingly mounted guide wheels 15, from which it is conducted to the armature. f

My apparatus operates briefiy as follows: The banding wire 29 is secured to the armature 31, as is graphically shown in the Fig.

2, and an initial tension is applied to the wire through the motor 27, which is a constant-torque motor energized to function opposite to the direction of rotation of the armature. The motor functions similarly to a motor employed in gathering reels where the cable is unwound against the torque of the motor, so as to prevent slack. The amount of tension may be varied Vby changing the ratio of the gears 12 and 25 which is accomplished by shifting a lock pin 32 to engage any one of the gears 24 with the shaft 11.

In starting the winding of the wire 29 around the armature 31, an excessive tension or strain is produced which is temporarily taken up by the yielding guide wheels 15 until compensated for thro-ugh the feeding mechanism. The tension may be varied at any time by manipulating the pin 32 to mesh a gear corresponding to the tension desired. The wire is wound on the armature, and the saddle or carriage 7 may be fed along as the wire forms in contiguous layers on the armature by manipulating the hand wheels 8 in the direction in which the wire is wound.

From the above it is evident that my device is capable of banding armatures at a uniform tension and With a specific amount of tension in a simple and expedient manner.

Although l have described a speciiic embodiment of my invention, it Will he obvious to those skilled in the art that various modilications may he made in the details of construction Without departing from the principles herein set forth. For instance, the general construction ot the hed-plate support and carriage mounting may he modiiied to suit any specific application, and the various parts of my apparatus may he altered to' accomplish the purpose for which it is utilized.

I claim as my invention:

l. A Wire-tension device comprising` gear transmission, a tension drum and an actuating device, said drum and actuatiirg` device beingconnected to said transmission.

2. A Wire-tension device comprising' a gear transmission, tension drum and an electric motor, said drum and motor being;` connected to said transi'nission.

3. Wire-tension device compr egear transmission, a tension drum motor connected to said transmission and means for changing 'the ratio of said` transmission.

t. Wire-tension dev c rear transmission,` a tension tor connected to said trai t and means for changing the ge r ratio of said transmission and the tension on said drum.

5'. A Wire-tension device comprising :i gear transmission, a tension drum and constant-torque motor, said drum and motor being' connected to said transmissoi means for changing the rear ratio ot sa d transmission and the tension on said drum.

6. At Wire-tension device eomprising` a gearA transmission, a tension drum and constant-torque motor connected to said transmission and means for varying; the tension e comprising a 'i and moon said drum, said means comprising a shifting pin for locking one of the gears to the tension-drum aXle.

7. ii. Wire-tension device comprising` a gear transmission, a tension drum and a con-stai#r Ytorque motor connected to said transmission, said motor beingenergized to ap torque in a direction opposite t0 the normal rotation of said drum, and means for varying the gear ratio of said transmission.

8. fr Wire-tension device comprising a bed a carriage movahiy mounted thereon, dr im, a transmission and a rque motor mounted-,on said carriao'e, a plurality of Wire-guide Wheels rotatahiy mounted in co-operative alignment with said drum on said carriage and means ly mountingfan armature on said for rotatah heil plate to Wound.

9. wire-tension device comprising a bed plate, a carriage movahly mounted thereon, a tension drum, a gear transmission and i constant-torque motor mounted on said carriage, a plurality of Wire-guide Wheels rotatahlj,v mounted in co-operative. align- 'it with said dru n, and means for relieving` the initial Aon ot the Wire.

i0. it wire-tension device comprising;` a Y' le, a carriage movalo'ly mounted t a tension drum, a gear transmission and a constant-torque motor mounted on said carriage, a plurality ot' Wire guide Wheels rotatably mounted iny co-opeiative alioument with said drum and means for relieving; the initial tension of the wire, said means comprising' a pair of Wire-guide wheels rotatably mounted on a pair of movahie e iters having a coil spring disposed therebetween.

In testimony whereof, l have hereunto subscribed my name this 12th day. of September, i922.

ROBERT J, WHITE. 

